The key here is to insert into each HTML element the global classes to format your code. Above, you can see I added the 'form' class to the table, 'formheader' to the header rows, and 'forminput' for each field.

This snippet may be used as a post-validator to verify that a column exists within a Propel table. It's a trivial derivative of the sfValidatorPropelUnique (so much so I left the copyrights in place). It's strictly a that validator with the logic reversed.